Should we rename `GraphDefinition` to `DataRepresentation`?

[RasmusOrsoe]

As we are transitioning into a deep learning library, I think we should strongly consider to rename one of our key modules GraphDefinition to a less GNN-centric name, e.g. DataRepresentation.

@AMHermansen @Aske-Rosted do you have opinions on this?

[Aske-Rosted]

Maybe let's wait and see for a bit.